Please actually help. 4 by 4 chart. Numbers in each row and column has to equal 20 when you add them. Diagonals not included. Will mark brainliest.

Twelve friends shared 8 small pizzas equally. how many pizzas did each person get?

The number of 8th graders who responded to a poll of 6th grade and 8 th graders was one fourtg of the number of 6th graders whi responded if a total of 100 students responddd to the poll how many of the students responded were 6 th graders

On #16 : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.